The first two wave types, P and S, are called body waves because they travel or propagate through the body of Earth. The latter two are called surface waves they the travel along Earth's surface and their amplitude decreases with depth into Earth.
Toysmith Spring Ring Game. Here is a super fun game the kids might like. Nordstrom has this Toysmith Spring Ring Game for $14.98! That is down from the normal price of $24.99, for a 40% savings.
It can cost as much as you want to spend on it. Engagement rings can cost anywhere from $500, $5000 to even $50,000. Factors such as the carat, color, clarity and cut of the diamond as well and whether it is made in yellow gold, white gold or platinum also have an impact on the cost.